Speed reading four kind of vacuum pump principle and application
it is very important to vacuum pump mechanical equipment, widely used in production. There are many types of vacuum pump also. Do you know about the working principle of different types of vacuum pump? Below small make up of several types of vacuum pump are classified, and introduces the characteristics of the vacuum pump, working principle and application scope.
1。 Screw vacuum pump
in addition to the common characteristics of positive displacement pump, screw vacuum pump can also be applied to many do not allow liquid mixing and rotating occasions, because it has a continuous and uniform axial flow, small ripple, low speed of internal advantages and allows more air and other gas mixture.
scope of application: widely used in petroleum, chemical, chemical, power, offshore engineering, shipbuilding, precision machine tools, food and other industrial sectors.
2。 Gear water pump
gear pump features: (1) simple structure, low price; (2) job requirement is low; (3) applications; (3) each end cover and gear tooth form many fixed seal cavity, can only be used as a quantitative pump (4) light weight, good in usability, low prices, strong self-priming capacity, is not sensitive to oil pollution, large speed range, the shock load, convenient maintenance, reliable operation; 5 unbalanced radial force, flow pulsation is big, big noise and low efficiency, poor parts interchangeability, difficult to repair after wear, cannot be used as variable pump. Scope:
general transportation lubricating liquid, such as fuel oil and lube oil sector; It in the machinery industry is used as the medium small force of the hydraulic system and the lubricating oil system of the auxiliary oil pump. It can be used to transport high viscosity materials, such as nylon, polyethylene, polypropylene and other molten resin in the chemical industry.
3。 Vane vacuum pumps
vane vacuum pump features: output flow more uniform than gear pump, smooth operation, low noise. Working pressure is high, the volumetric efficiency is high. Single-acting vane pump is easy to realize the flow control. Double-acting vane pump service life is long, because the rotor radial hydraulic balance. However, vane pump self-priming ability is poor, is sensitive to oil pollution, the blade easily got stuck impurities, poor reliability. Complex structure, high manufacturing accuracy, high cost.
application: applicable to medium viscosity liquid.
4。 Rotary vane vacuum pumps
rotary vane vacuum water pump small size, light weight, low noise. There is a gas ballast valve can remove a small amount of water vapor. In the environment temperature from 5 ℃ to 40 ℃, within the scope of the inlet pressure is less than 1. 3 x 103 mpa, allowed to run continuously for a long time. When pumping gas relative humidity above 90%, should open the gas ballast valve. Equipped with automatic protection oil return valve, easy to start. Air inlet may not run smoothly for more than a minute. Does not apply to extract will react a corrosive action on metals, and the pump oil, containing particles of dust and gas containing too much oxygen, the explosive and toxic gases. Scope:
has been widely used in metallurgy, machinery, military industry, electronics, chemical industry, light industry, petroleum, medicine and other production and scientific research departments.
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